SEGMENT AND MAJOR CUSTOMER INFORMATION (Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 28,938	$ 27,948	$ 27,975	$ 25,042	$ 22,647	$ 28,008	$ 27,912	$ 24,987
Revenue									$ 109,903	$ 103,554	$ 99,823
Cost of sales									(79,184)	(58,087)	(57,984)
Operating, general and administrative expenses									(33,228)	(27,231)	(24,334)
Selling, General and Administrative Expense									12,139	7,217	5,742
Environmental remediation	(1,600)				(2,700)		(2,900)		(1,576)	(5,600)	0
Gain (loss) on sale of timberland									(87)	0	(12,547)
Income (loss) from operations	(4,546)	$ (2,017)	$ 189	$ 2,376	(2,545)	$ 4,172	$ 3,809	$ 6,957	(3,998)	12,636	30,052
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									31,849	27,651	19,657
Amortization of debt issuance costs									94	74	64
Total									31,943	27,725	19,721
Assets	493,549				508,249				493,549	508,249	380,673
Capital and Land Expenditures	26,209				155,311				26,209	155,311	21,656
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									116,937	109,118	103,960
Operating, general and administrative expenses									(40,262)	(32,795)	(28,471)
Income (loss) from operations									(3,998)	12,636	30,052
Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									(7,034)	(5,564)	(4,137)
Operating, general and administrative expenses									7,034	5,564	4,137
Income (loss) from operations									0	0	0
Corporate, Non-Segment, Before Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									0	0	0
Operating, general and administrative expenses									(12,243)	(7,324)	(5,846)
Income (loss) from operations									(12,243)	(7,324)	(5,846)
Corporate, Non-Segment, Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue											0
Operating, general and administrative expenses									104	107	104
Income (loss) from operations									104	107	104
Corporate, Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									0	0	0
Cost of sales									0	0	0
Operating, general and administrative expenses									(12,139)
Environmental remediation									0	0
Gain (loss) on sale of timberland									0		0
Income (loss) from operations									(12,139)	(7,217)	(5,742)
G&A
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									49	72	55
Assets	5,008				6,917				5,008	6,917	5,118
Capital and Land Expenditures	69				65				69	65	58
Partnership Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									39,987	45,422	39,672
Cost of sales									(19,605)	(17,828)	(14,874)
Operating, general and administrative expenses									(5,288)	(6,268)	(5,671)
Environmental remediation									0	0
Gain (loss) on sale of timberland									(87)		0
Income (loss) from operations									15,181	21,326	19,127
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									4,791	4,228	4,121
Partnership Timber | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									40,785	45,916	40,004
Operating, general and administrative expenses									(6,266)	(6,943)	(6,177)
Income (loss) from operations									15,001	21,145	18,953
Assets	90,508				94,353				90,508	94,353	91,206
Capital and Land Expenditures	2,207				8,186				2,207	8,186	7,168
Partnership Timber | Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									(798)	(494)	(332)
Operating, general and administrative expenses									978	675	506
Income (loss) from operations									180	181	174
Funds Timber
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									48,646	49,819	33,842
Cost of sales									(48,142)	(36,732)	(26,910)
Operating, general and administrative expenses									(5,790)	(4,672)	(3,893)
Environmental remediation									0	0
Gain (loss) on sale of timberland									0		(12,547)
Income (loss) from operations									(5,286)	8,415	15,586
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									26,656	23,009	15,170
Assets	366,551				370,386				366,551	370,386
Funds Timber | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									48,646	49,819	33,842
Operating, general and administrative expenses									(11,322)	(9,239)	(7,261)
Income (loss) from operations									(10,818)	3,848	12,218
Assets	366,551				370,386				366,551	370,386	244,846
Capital and Land Expenditures	20,984				143,445				20,984	143,445	6,808
Funds Timber | Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									0	0	0
Operating, general and administrative expenses									5,532	4,567	3,368
Income (loss) from operations									5,532	4,567	3,368
TIM
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									18	9	9
Cost of sales									0	0	0
Operating, general and administrative expenses									(4,893)	(4,495)	(3,520)
Environmental remediation									0	0
Gain (loss) on sale of timberland									0		0
Income (loss) from operations									(4,875)	(4,486)	(3,511)
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									92	72	32
TIM | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									5,760	4,576	3,377
Operating, general and administrative expenses									(5,173)	(4,566)	(3,593)
Income (loss) from operations									587	10	(216)
Assets	215				211				215	211	83
Capital and Land Expenditures	140				192				140	192	32
TIM | Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									(5,742)	(4,567)	(3,368)
Operating, general and administrative expenses									280	71	73
Income (loss) from operations									(5,462)	(4,496)	(3,295)
Real Estate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									21,252	8,304	26,300
Cost of sales									(11,437)	(3,527)	(16,200)
Operating, general and administrative expenses									(5,118)	(4,579)	(5,508)
Environmental remediation									(1,576)	(5,600)
Gain (loss) on sale of timberland									0		0
Income (loss) from operations									3,121	(5,402)	4,592
Depreciation, depletion and amortization, excluding amortization of debt issuance costs									261	270	279
Real Estate | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									21,746	8,807	26,737
Operating, general and administrative expenses									(5,258)	(4,723)	(5,594)
Income (loss) from operations									3,475	(5,043)	4,943
Assets	31,267				36,382				31,267	36,382	39,420
Real Estate | Operating Segments | Real Estate project expenditures
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Capital and Land Expenditures	2,772				3,210				2,772	3,210	7,588
Real Estate | Operating Segments | Real Estate-other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Capital and Land Expenditures	$ 37				$ 213				37	213	2
Real Estate | Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue									(494)	(503)	(437)
Operating, general and administrative expenses									140	144	86
Income (loss) from operations									$ (354)	$ (359)	$ (351)